<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>翘边影</title>
</head>
<body>
  <div class="box">
  </div>
</body>
<style>
  .box {
    position: relative;
    width: 200px;
    height: 320px;
    margin: 0 auto;
    box-shadow: 0 1px 4px rgba(0, 0, 0, .27), 0 0 40px rgba(0, 0, 0, .06) inset;
    background-color: #fff;
  }
  .box::before, .box::after {
    content: "";
    display: inline-block;
    width: 55%;
    height: 55%;
    box-shadow: 0 8px 16px rgba(0, 0, 0, .5);
    position: absolute;
    bottom: 10px;
    z-index: -1;
  }
  .box::before {
    left: 15px;
    transform: skew(-15deg) rotate(-6deg);
  }
  .box::after {
    right: 15px;
    transform: skew(15deg) rotate(6deg);
  }
</style>
</html>